Athlon 64 X2 TK-55 vs Athlon II X4 645

Place in the ranking	2167	3089
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.30	no data
Market segment	Desktop processor	Laptop
Series	no data	2x Athlon 64
Power efficiency	1.47	1.01
Architecture codename	Propus (2009−2011)	Taylor / Hawk-256
Release date	21 September 2010 (14 years ago)	no data
Launch price (MSRP)	$80	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Athlon II X4 645 and Athlon 64 X2 TK-55 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	2 (Dual-core)
Threads	4	2
Base clock speed	3.1 GHz	no data
Boost clock speed	3.1 GHz	1.8 GHz
Bus rate	no data	667 MHz
L1 cache	128 KB (per core)	no data
L2 cache	512 KB (per core)	no data
L3 cache	0 KB	no data
Chip lithography	45 nm	65 nm
Die size	169 mm²	no data
Number of transistors	300 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Athlon II X4 645 and Athlon 64 X2 TK-55 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	no data
Socket	AM3	no data
Power consumption (TDP)	95 Watt	31 Watt

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 645 and Athlon 64 X2 TK-55. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

no data

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 645 and Athlon 64 X2 TK-55.

PCIe version

2.0

no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Athlon II X4 645 1.48
+348%

Athlon 64 X2 TK-55 0.33

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Athlon II X4 645 2351
+354%

Athlon 64 X2 TK-55 518

Gaming performance

Pros & cons summary

Performance score	1.48	0.33
Physical cores	4	2
Threads	4	2
Chip lithography	45 nm	65 nm
Power consumption (TDP)	95 Watt	31 Watt

Athlon II X4 645 has a 348.5% higher aggregate performance score, 100% more physical cores and 100% more threads, and a 44.4% more advanced lithography process.

Athlon 64 X2 TK-55, on the other hand, has 206.5% lower power consumption.

The Athlon II X4 645 is our recommended choice as it beats the Athlon 64 X2 TK-55 in performance tests.

Note that Athlon II X4 645 is a desktop processor while Athlon 64 X2 TK-55 is a notebook one.

Should you still have questions on choice between Athlon II X4 645 and Athlon 64 X2 TK-55, ask them in Comments section, and we shall answer.